Scroll-sawing machine.



No. 663,87l.V

PatntedV Dec. I8, |900. T. CURLEY.

SCROLL SAWING MACHINE. (ppucation med sept. 25, 1899.)

(No Model.)

o.. o mw mi n" e D d e t n e t a DI v.. E IL R nu .c .n 8, 3 6 6 n" NSCROLL SAWING MACHINE.

(Application le Sept. 25, 1899;)

' 2 Sheets-Sheet 2!.

(No Model.)

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THOMAS OURLEY, OF TROY, NEW YORK.

SCROLLUSWlNG MACHIN E.

SPECIFICATION forming part of Letters Patent No. 663,871, dated December18, 1900.`

Application iiled September 25, 1399- Seral N0- 731,628. (No model.)

T0 all whom it may concern:

Be it known that I, THOMAS OURLEY, a citi- `zen of the United States,residing at Troy, in

the county of Rensselaer and State of New York, have invented a.new anduseful Improvement in Scroll- Sawing` Machines, of which the followingis a specification.

My invention relates to sawing-machines, and more particularly to thatclass known as scroll-sawing machines, the object of the invention beingthe production of an improved machine of that class in which means areprovided for readily and easily making all of the adjustments of partsnecessary insuch machines, all the parts being strong, durable, andeconomically constructed and the general operation being improved.

In the drawings forming part of this speciiication, Figure 1 is a viewin side elevation of a machine constructed in accordance withInyinvention. Fig.2 is an end elevation thereof. Fig is an enlargeddetail vie w,in end elevation,of the head of the machine. FigAE is anenlarged detail view of the table,partly broken away. Fig. is asectionalview on the broken line 5 5 of Fig. 4c. Figs. 6, 7, and 8 are detailviews of detached parts to be hereinafter described. Fig. 9 is a detailview illustrating the keeper for the saw-guide-operating lever.

Like numerals of reference mark the same` parts wherever they appear inthe several figures of the drawings.

Referring to the drawings by numerals, 10 indicates the base orpedestal, and 11 the arm or gooseneck, these two parts being formed ofthree cast hollow pieces secured together by bolts and forming theframeof the machine, being adapted to be secured to a bench or other suitablesupport by means of bolts 12. Upon the frame is pivotally secured thetable 13, which is pivotally mounted and adj ustable onV its pivot' tovary its inclination from the horizontal, being secured at any desiredinclination by means of a set-bolt 14:, passing through a curved slot l5in a plate 16 and threadedinto the arm, such adjusting means being of awell-known construction.

17 indicates the saw-plate, made of metal, as are all the parts of themachine with the exception of the table 13, to which the sawplate issecured by dowels le, as seen in Fig.

4. The particular construction of the sawplate will be describedlateron.

l5 indicates a iixed block or head secured by bolts 16a to a bracket17a, which in turn is secured to the arm or gooseneck 11 by bolts 18.The head or block 15t is provided on its rear side with a rib or tongue18, over which a groove 19 of a sliding` block or strain 2O fits and isslidable, the block 2O being fixed at dilerent heights on the head bymeans of a pin 2l, fitting in registering holes in head and block.

22 indicates a link, of which there are two, one on each side of thehead and projecting beyond its edge, overlapping and secured to thesliding block. In the outer ends of these links are slots 23, in whichis journaled a shaft 24, having a cam or eccentric 25, as shown indotted lines in Fig. 3, between the links and bearing against the head.The shaft 24 is turned by a hand-wheel 26 and by the cam bearing againstthe head securely clamps the sliding block toit. The'position of theshaft 2/lin slots 23is adj usted by set-screws 27. At the upper end ofthe block 20 is journaled a Semicircular casting or half-pulley 28, anda strap or band 29, passing over said half-pulley, is secured theretobya screw 30 at a point nearerthe pivoted center than the rim. This band29 is carried down from this point and provided at itsend with a plate3l, having an opening to receive the hooked upper end of aspring 32,coiled in a space in the sliding block and attached at its lower end toa screw 33, passing through a plug 34 and adjustably held by a thumb-nut35. The opposite end of the band 29 passes from the rim of thehalfpulley downward through the block, being provided at its lower endwith a metal plate or hook 36 to engage the upper end of the sawblade37. On its passage downward the strap or band 29 passes through thelower end or head of a bracket 39, which is adjustably secured to thelower end of the sliding block by means of a bolt 40, passing upwardthrough a slot in the bracket and into the bottom of the block. Byadjusting the bracket the band can be guided and controlled in itsreciprocation, so as to avoid lateral strain on the saw. The spring 32holds the band in its withdrawn or raised position IOO and serves togive thel upward stroke of the a hole in the strip 68, a dog 74preventing it saw. The lower stroke is effectedby means of a pitman 4l,connected at its lower end to a crank or wrist pin 42 on a disk 43 atthe end of a shaft 44, journaled in the frame of the machine and drivenby a belt 45 from, any lineshaft pulley, said belt engaging on fast andloose pulleys 46 and 47 on said shaft 44.

48 indicates a treadle-lever pivoted to a standard 49, projectingrearward beyond its pivot and carrying a pivot-ed brake-shoe 50, adaptedto engage the periphery of the disk 43 when the treadle is depressed.The rear end of the treadle-lever is forked, as at 51, and embraces thehorizontal arm 51a of a bellcrank or elbow lever 52, pivoted at itsangle to a standard 53. The vertical arm 54 of the elbow-lever isprovided with pins 54a to engage on opposite sides of the belt. By thismeans the belt is shifted to the loose pulley 47 when the brake isapplied. To release the brake and shift the belt back to the fast pulley46 in order to start the machine, the treadlelever is provided at apoint in the rear of its pivot with an upwardly and forwardly projectingarm 55, having a treadle 56 near its upper end projecting frontward, andby pressing the foot upon the treadle 56 the lever is depressed in therear, thus shifting the belt and releasing the brake simultaneously.

In its reciprocation the saw-blade is guided by running in a space ornotch 57 between two plates 58, adjustably xed by screws 59 to the faceof a block secured on the end of a horizontal bar 6l, said bar beingsplit, as at 62, and secured in the block 60 by means of a bolt 63,threaded through one half and bearing against the other, so as to spreadthe parts apart in the block. The horizont-al bar is adj ustably fixedin the lower end of a vertical bar 64 by a set-screw 65, said bar 64being vertically adjustable in the head 15a and securable at any heightby means of a setscrew 66. By adjusting the plates 58 the space or notch57 may be widened or narrowed to suit different thicknesses of saws. Byadjusting the horizontal bar in the vertical bar the saw may be pressedforward or allowed to go farther back, and by adjusting the vertical barthe position of the guide may be varied vertically by raising orlowering the vertical bar in the head.

The saw-plate 17 is adjusted with relation to the saw so that the bladereciprocates at the center of the plate, and in order to keep the saw inperfect alinement it is caused to pass througha kerf 67 in a woodenstrip 68,

dovetailed to slide in a radial slot in the sawplate. This strip,preferably of hickory wood, is provided with a series of holes 69 in oneside to receive the point of an elastic lever 70, said lever beingpivotally and slidably connected to the saw-plate bya pin 7`1, whichprojects through a slot 72 in the lever. The elastic lever passes undera curved keeper 73. With the lever in position shown in full lines inFig. 4 the lever is held pressed into from moving laterally, and a pin75 bearing against the keeper prevents its longitudinal withdrawal. Whenmoved to theposition shown in dotted lines in Fig. 4, which movement ispermitted by the release of the dog, the pin 75 is opposite to therecessed portion 76 of the keeper, thus permitting of the longitudinalwithdrawal of the lever-and the releaseof its point from the hole in theslip. The kerf in the strip having been worn too large, the strip isdrawn out of its seat, sawed off at the line 67, a new kerf cut in theend, and vthe strip replaced, thus always keeping a perfect alinement ofthe saw.

78 indicates the casing of a fan, secured in position by. bolts 79, adischarge-spout 80 leading down in close proximity to the sawblade toclear away the sawdust out of the lines to be followed on top, and adischargespout 8OZt following the gooseneck, as shown in dotted lines inFig. 1, and discharging under the table to keep the guides 81a clear ofsawdust, the fan being secured on a shaft 81, having a grooved pulley 82to receive a cord belt 83 from a grooved pulley 84 on a shaft journaledin the fan-casing, the shaft 85 being driven by a belt 86, engaging apulley 87 on the shaft.

In the operation of my invention the downward or working stroke of thesaw is positive, as before described, and the upward or return strokeyielding. Saw-blades of different lengths may be used by adjusting theposition of the sliding block on the head. The saw is guided andcontrolled in its movements to produce the best results and the wholemachine simplified and its utility increased.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. In a scroll-sawing machine, the combination of the gooseneck, thehead rigidly secured thereto, a slidable strainer-block adjustablysecured to the head, links embracing the head and secured to thestrainerblock, a shaft journaled in the links, and a cam on said shaftbetween the links and bearingl againstthe head, substantially asdescribed.

2. In a scroll-sawing machine, the combination of the gooseneck, thehead rigidly secured thereto, a slidable strainer-block adjustablysecured to the head, a half-pulley pivoted to the block, a band or strappassing over said half-pulley and secured thereto, a spring engaging oneend of the strap to draw it downward, a saw-blade secured to theopposite end of the strap or band, and means for drawing the saw-bladedownward, substantially as described.

3. In a scroll-sawing machine, the combination of the gooseneck, thehead rigidly secured thereto, a slidable strainer-block adjustablysecured to the head, a half-pulley pivoted to the block, a band or strappassing -spring engaging one end of the strap to draw it downward, ascrew on the lower end of the spring, said spring passing through anopening in the head, a plug for the lower end of the opening, having ahole through which the screw passes, and a nut on the screw below theplug, substantially as described.

5. In a scroll-sawing machine, the combination with a reciprocatorystrap for carrying the saw, a slidable block to which the strap issecured, a right-angled bracket, the vertical arm of which is providedWith a guide for the strap, and a bolt passing through a slot in thehorizontal arm into the bottom of the block, substantially asdescribed..

THOMAS OURLEY.

Vitnesses:

`WM. C. FEATHERS,

HAROLD K. DOWNING.

